MGA Tires

[gvernau@juno.com (George J. Vernau)]

I have a '57 MGA 1500 with an old set of 590-15 bias ply dry rotted tires
that need to 
be replaced.  The car has the original 4J x 15 steel disc wheels and I'd
like to replace the
tires with a modern set of steel belted radials.  I'm interested to hear
what modern size makes the most sense for the car, considering both near
original appearance, reasonable performance, and minimum speedometer
error.
Thanks,
George Vernau
Houston,TX